/* A front-end for libxmp that displays pattern data */
/* This file is in public domain */

#include <stdio.h>
#include <stdlib.h>
#include <xmp.h>
#include "sound.h"

static char *note_name[] = {
	"C ", "C#", "D ", "D#", "E ", "F ", "F#", "G ", "G#", "A ", "A#", "B "
};

static void display_data(struct xmp_module_info *mi, struct xmp_frame_info *fi)
{
	int i;

	printf("%02x| ", fi->row);
	for (i = 0; i < mi->mod->chn; i++) {
		int track = mi->mod->xxp[fi->pattern]->index[i];
		struct xmp_event *event = &mi->mod->xxt[track]->event[fi->row];

		if (event->note > 0x80) {
			printf("=== ");
		} else if (event->note > 0) {
			int note = event->note - 1;
			printf("%s%d ", note_name[note % 12], note / 12);
		} else {
			printf("--- ");
		}

		if (event->ins > 0) {
			printf("%02X", event->ins);
		} else {
			printf("--");
		}

		printf("|");
	}
	printf("\n");
}

int main(int argc, char **argv)
{
	xmp_context ctx;
	struct xmp_module_info mi;
	struct xmp_frame_info fi;
	int row, pos, i;

	if (sound_init(44100, 2) < 0) {
		fprintf(stderr, "%s: can't initialize sound\n", argv[0]);
		exit(1);
	}

	ctx = xmp_create_context();

	for (i = 1; i < argc; i++) {
		if (xmp_load_module(ctx, argv[i]) < 0) {
			fprintf(stderr, "%s: error loading %s\n", argv[0],
				argv[i]);
			continue;
		}

		if (xmp_start_player(ctx, 44100, 0) == 0) {

			/* Show module data */

			xmp_get_module_info(ctx, &mi);
			printf("%s (%s)\n", mi.mod->name, mi.mod->type);

			/* Play module */

			row = pos = -1;
			while (xmp_play_frame(ctx) == 0) {
				xmp_get_frame_info(ctx, &fi);
				if (fi.loop_count > 0)
					break;

				sound_play(fi.buffer, fi.buffer_size);

				if (fi.pos != pos) {
					printf("\n%02x:%02x\n",
					       fi.pos, fi.pattern);
					pos = fi.pos;
					row = -1;
				}
				if (fi.row != row) {
					display_data(&mi, &fi);
					row = fi.row;
				}
			}
			xmp_end_player(ctx);
		}

		xmp_release_module(ctx);
		printf("\n");
	}

	xmp_free_context(ctx);
	sound_deinit();

	return 0;
}